Scatter diagram analysis system and method for discriminating ventricular tachyarrhythmias
First Claim
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1. A method of discriminating ventricular tachyarrhythmias, comprising the steps of:
- (a) receiving data representing a first channel and a second channel both recording electrocardiographic signals from a patient'"'"'s heart;
(b) generating a series of data points, each of the data points having a first data element corresponding to the first channel and a second data element corresponding to the second channel; and
(c) discriminating ventricular tachyarrhythmias of the patient by determining a value representing a distribution of the data points.
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Abstract
A computationally efficient two channel scatter diagram analysis algorithm for distinguishing monomorphic ventricular tachycardia (VT) from polymorphic ventricular tachycardia and ventricular fibrillation (VF). Scatter diagram analysis plots the amplitude from one channel (morphology) versus the amplitude from another channel (rate) on a graph with a fifteen-by-fifteen grid. A fraction or percentage of the 225 grid blocks occupied by at least one sample point is then determined. Monomorphic VT traces nearly the same path in space and occupies a smaller percentage of the graph than a non-regular rhythm such as polymorphic VT or VF.
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Citations
43 Claims
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1. A method of discriminating ventricular tachyarrhythmias, comprising the steps of:
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(a) receiving data representing a first channel and a second channel both recording electrocardiographic signals from a patient'"'"'s heart; (b) generating a series of data points, each of the data points having a first data element corresponding to the first channel and a second data element corresponding to the second channel; and (c) discriminating ventricular tachyarrhythmias of the patient by determining a value representing a distribution of the data points. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of discriminating ventricular tachyarrhythmias, comprising the steps of:
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(a) receiving data representing morphology and corresponding rate measurements of a patient'"'"'s heart; (b) generating a series of data points, each of the data points having a first data element corresponding to the morphology measurements and a second data element corresponding to the rate measurements; and (c) discriminating ventricular tachyarrhythmias of the patient by determining a value representing a distribution of the data points. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method of discriminating ventricular tachyarrhythmias, comprising the steps of:
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(a) receiving morphology data and corresponding rate data for a particular patient; (b) applying a moving average filter to the morphology data and the rate data; (c) plotting the morphology data and the rate data, using a plurality of data points, on a graph having a first dimension representing morphology and second dimension representing rate; (d) overlaying a grid, comprising a plurality of cells, on the graph of the morphology and rate data; and (e) discriminating ventricular tachyarrhythmias of the patient by determining a value related to how many of the cells are occupied by the data points. - View Dependent Claims (18, 19, 20, 21, 22)
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23. A system for discriminating ventricular tachyarrhythmias, comprising:
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receive means for receiving data representing a first channel and a second channel both recording electrocardiographic signals from a patient'"'"'s heart; means for generating a series of data points, each of the data points having a first data element corresponding to the first channel and a second data element corresponding to the second channel; and analysis means for discriminating ventricular tachyarrhythmias of the patient by determining a value representing a distribution of the data points. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30)
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31. A system for discriminating ventricular tachyarrhythmias, comprising:
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receive means for receiving electrocardiographic signals from a patient'"'"'s heart, comprising; means for receiving morphology signals; and means for receiving rate signals; sampling means for sampling the morphology signals and the rate signals in order to produce a set of morphology data and rate data; means for generating a series of data points, each of the data points having a first data element corresponding to the morphology data and a second data element corresponding to the rate data; and analysis means for discriminating ventricular tachyarrhythmias of the patient by determining a value representing a distribution of the data points. - View Dependent Claims (32, 33, 34, 35, 36, 37)
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38. A system for discriminating ventricular tachyarrhythmias, comprising:
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receive means for receiving morphology data and corresponding rate data for a particular patient; filter means for applying a moving average filter to the morphology data and the rate data; graphing means for plotting the morphology data and the rate data, using a plurality of data points, on a graph having a first dimension representing morphology and second dimension representing rate; grid means for overlaying a grid, comprising a plurality of cells, on the graph of the morphology data and the rate data; and analysis means for discriminating ventricular tachyarrhythmias of the patient by determining a value related to how many of the cells are occupied by the data points. - View Dependent Claims (39, 40, 41, 42, 43)
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Specification